> It made me realize that myself, along with many students, mask their points with language because they have nothing to say, or are afraid to say it clearly
You're right about high schoolers using needlessly complicated writing, but this isn't why. A high schooler would use needlessly complicated writing even if he was eager to share his ideas about a topic.
The reason is that K-12 schools teach this style of writing as an aesthetic. Other parts of the aesthetic include scattering your stories with "symbols," so that they mean something other than they appear to, and exaggerating your and your characters' emotions.
A student who grows up immersed in this aesthetic would not secretly prefer a more simplistic writing style, any more than a person who grows up eating American food would secretly prefer Indian food.
Your friend was inducting you into the aesthetic of modern journalists and bloggers, but if he was instead reading the academic humanities, or if he was a time traveller from the 1950s, he would have been perfectly happy with "utilize."
Of course, plain language is better at conveying information, so I'm fully on that train myself--now that I've spent some time out of high school. But it's normal to adopt the aesthetics of your surroundings, and it's not a sign of masking anything or being afraid.